Koyasan (高野山) or Mount Koya is a World Heritage Site considered as the center of Shingon Buddhism which was brought to Japan in 805 by the religious figure, Kukai. The 25-meter high Daimon Gate welcomes visitors dedicated to esoteric Buddhism. Over 100 temples are scattered throughout the grounds.
The most prominent structure in Koyasan is the Kongobuji Temple. It plays a significant role as the head of Shingon Buddhism in Japan.